Electric strop motion device for looms



Oct. 27, 1942. J. R. BROOKS ETAL v ELECTRIC STOP MOTION DEVICE FOR LOOMS 2 Sheets-Sheet l Filed Aug, '7. 1941 QTW@ WOL. Q

NWLIBQ oct. 27, 1942. L R, BROQKS ETAL '2,300,098

ELECTRIC STOP MOTION DEVICE FOR LOOMS Filed Aug. '7. 1941 2 Sheets-Sheet 2 wuQ/wf/O'US @YJ E. Beca/ 5 J'. 7.' COL m20.

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Patented Oct. 27, 1942 ELECTRIC STOP MOTION DEVICE FOR LOOMS John Ruble Brooks, Altavista, Va., and' Jesse Thomas Colvard, Drayton, S. C.

Application August 7, 1941, Serial No. 405,862

4 Claims. (Cl. 139-336) The invention relates to an electric stop motion for looms designed to stop the loom immediately upon a power interruption.

One of the objects of the invention is to provide means to automatically stop the loom upon power interruptions thus enabling the loom to be stopped at a predetermined'position, generally when the shuttle is in the shuttle box. This prevents the shuttle from injuring the warp, or boxing improperly, as is the case where the loom is allowed to coast to a stop at power interruptions. Furthermore the present invention is designed to stop the loom at a predetermined position so as'to cause a minimum of injury from standing.

According to the present invention the improved stop motion is solenoid actuated and is intimately connected with a conventional warp stop motion. In the preferred embodiment of the invention a suitable solenoid for actuating the power stop motion is connected in the power circuit that actuates the motor which drives the loom. This solenoid controls a dagger or knock-off, which is connected to or forms part of the conventional warp stop motion whether electrical or mechanical. When current is supplied to the solenoid, the dagger or knock-offv controlled thereby may remain in inoperative position, but when power is cut off the dagger or knock-off is brought into position to be engaged by a portion of the loom, the bunter in the case of electrical warp motion, or the crank shaft arm in the case of a mechanical stop warp motion, thereby causing the shipper handle to stop the loom in the conventional manner.

The invention will be more readily understood by reference to the accompanying drawings in which:

Fig. 1 is an elevation showing our electrical power stop motion applied to the frame of a loom, and showing also a portion of a conventional electric Warp stop motion.

Fig. 2 is a detail view on a larger scale showing our electric power stop motion.

Fig. 3 is a detailview taken at right angles to Fig. 2.

Fig. 4 is a detail perspective View showing the connections between the dagger of our electric power stop motion and the dagger of the usual stop motion.

Figs. 5 and 6 are detail views showing a modied construction which may be used in conjunction with a conventional mechanical warp stop motion.

Referring to the drawings, reference numeral I0 .denotes a portionof the frame upon which the warp stop motion A and the power stop motion B are mounted. A portion of the conventional motor gear is indicated at |00, a portion of the loom arch is indicated at IOI and a portion of the quill battery is indicated at I02.

The electric warp stop motion is or may be of a conventional type manufactured by the Draper Corporation, and includes a solenoid II generally located at the right hand side of the loom frame. The solenoid I I is adapted to be actuated by power passing through a cable I2, The solenoid actuates a rod I3 which in the present device is shown as connected through a suitable connector I4 to a lower vertical rod I5. at the end of which is mounted the usual dagger I 6 pivoted at I'I and connected to the knock-off I8. The dagger when raised is adapted to be contacted by a bunter 20 carried upon the lay 2 I, and through suitable connections (not shown) the rearward movement of the dagger by the bunter causes the shipper handle (not shown) to stop the loom.

According to the present invention the power stop motion B is intimately connected to the conventional warp stop motion so that when power is cut off the shipper handle is caused to stop the loom, through the same mechanism that is actuated by the warp stop motion. The added power stop motion does not in any way interfere with the usual operation of the warp stop motion.

As shown the electric power stop motion includes a solenoid 25 supplied with current through wires 26 which receive their current from the same source as that operating the loom, so that when the power which supplies the motor for driving the loom through the motor gear |00 'is cut off for any reason the power which supplies the Solenoid 25 is also out off. The solenoid 25 is shown attached to a plate 3i by means of bolts 21, the plate being secured to the side of the loom and being provided with a slot 32 which is adapted to fit over a convenient loom bolt 33, and securely fastened to the loom frame. The solenoid is of the pulling type wherein its movable core 23 is drawn toward the solenoid when current is applied. A spring 20 is connected to the core through a horizontal portion 35 of a Vertical rod 34, and is adapted to raise the core when current to the solenoid is cut off. The spring is connected at its upper end to a bracket arm 30 which extends horizontally from the plate 3l. Another horizontal arm |03 extends from one side of the plate and is provided with an aperture to serve as a guide for the rod 34. intermediate the ends of the rod 34 there is provided a bent portion 38 to allow for adjustment to lengthen or shorten the same. At the lower end of the rod there is mounted a dagger 3S similar to the dagger l5 of the warp stop motion, and pivoted to the same pivot I'I upon which the dagger I6 is mounted, which pivot is carried by the knock-offv i8.

When the loom is in operation current will be supplied to the solenoid 25 and the dagger 35 will be in its lower or inoperative position. When, however, power is cut off for any reason the spring 29 raises the solenoid core and at the same time raises the rod 34 and dagger 36 to the dotted position. This position is determined by a stop IM which extends horizontally from the plate 3l. In the raised position the point of the dagger 35 is in the path of the bunter 2 carried by the lay 2| which bunter forces the dagger 35 and knock-off i3 rearwardly thereby tripping the shipper handle (not shown) through the regular stop motion Vto cause the loom to stop'at a predetermined setting for stops. The operation is similar to the manner in which the dagger I6 of the electric warp stop motion is operated, except that the dagger 36 is motivated from a different source and at power interruptions. Accordingly the improved device coacts with the conventional warp stop motion, requiring no change of present facilities for installation.

While the present device has ybeen described in connection with an electric warp stop motion the power stop motion may also be associated with the standard mechanical Warp stop motion.

Such a modification is indicated in Figs. 5 and 6.

In this modification the reference number 34a corresponds to the rod '34 of the preceding iigures, which is operated by the solenoid 25. The modified device is intended to be fastened t-o the left hand side of the loom frame, directly above the knock-off 52 of the mechanical ywarp stop motion. The rod 3de is hooked as at 50 beneath a projection 51| of the knock ofi 52. Lifting the rod 34M, which ccurs when power to the loom is interrupted, moves the knock-off 52 and dagger 53Uconnected therewith to the dotted position. The `crank shaft arm (not shown) then strikes the knock-01T as in mechanical warp stop motion Cil and causes the shipper handle to stop the loom at power interruptions.

The invention has been described in detail for the purpose of illustration but it will be obvious that numerous modifications and variations may be resorted to Without departing from the spirit of the invention.

We claim:

1. The combination with a loom warp stop motion including a knock-olf for causing the shipper handle to stop the loom When actuated by a moving part of the loom, and with the electric power circuit of the loom, of a dagger connected with said knock-off and adapted to be moved into and out of the path of said moving part, and auxiliary mechanism for interposing said dagger in the path ofl `said moving part upon the breaking 0f said power circuit, whereby the knock-off is automatically actuated by said moving part to positively stop the loom on interruption of power to the loom.

2. The combination as set forth in claim 1 wherein the Warp stop motion is'of the electrically actuated type and includes a pivoted dagger connected to the knock-olf and adapted in one position to be engaged `by a bunter carried upon the lay of the loom, and the dagger actuated4 by said auxiliary mechanism is pivoted to the knock-off adjacent the warp stop dagger. v

3. The combination as set forth in claim l wherein the warp stop motion is of the mechanical type and includes a knock-off having a dagger adapted in one position to be engaged by a moving portion 0f the loom, and the auxiliary mechanism includes a solenoid actuated rod having a hook at one end adapted to engage a portion 0f the knock-off to bring the dagger into the path of the moving part of the loom.

4. The combination as set forth in claim 1 wherein the auxiliary mechanism includes resilient means tending to bring the dagger into the path of a moving portion of the loom, and solenoid means located in the power circuit of the loom serving to restrain said resilient means as .I long as the power circuit is uninterrupted, but releasing as soon as the circuit is interrupted.

JOHN RUBLE BROOKS. JESSE THOMAS COLVARD. 

